I found this article while looking through The National Holiday List. I still don't see what they have to do with each other. "National Yellow Pig Day on July 17th honors the unique attributes of the number 17 and its significance to mathematics. If you don’t think the number 17 plays any role in our lives, consider these facts: The number 17 is a premium number in the arena of prime numbers. Add the first four prime numbers together, and 17 is their sum. The average school bus weighs 17 tons with passengers inside. Each of the following words has 17 letters: interdisciplinary telecommunication misinterpretation commercialization electrophotometer The atomic number of chlorine is 17. Pebble Beach has a specific road known as the 17 Mile Drive along the Monterey Peninsula in California. However, the exact length of the road is 16.78 miles. The 17th Amendment of the U.S. Constitution gave the citizens of the United States the right to elect their senators